Add distilled water to the beaker until the volume
totals 15 mL.
Record the amount of cornstarch that dissolved.
all
about half
none
20
25 ml
15
10
5
Intro
Answers
Answer:
The correct answer on edge for 2021 is C. None.
Explanation:
We know this is correct because the solution is heterogenous after it has been stirred: the substance is not soluble in water.
The solution is heterogeneous after it has been stirred. The cornstarch is not soluble in water. Therefore, option C is correct.
What is the solution?Any mixture of one or more solutes that have been dissolved in a solvent is referred to as a solution. To create a homogenous mixture, a solute must dissolve in a solvent. To create a homogenous mixture, a solute must dissolve in a solvent.
Whereas homogenous mixtures seem consistent throughout, heterogeneous mixtures have clearly discernible components. A solution, which can be a solid, liquid, or gas, is the most typical kind of homogenous mixture.
No matter how you sample a homogenous solution, it often has the same characteristics. Sources of water, saline solution, certain metals, and bitumen are homogenous mixes. Examples of heterogeneous combinations are chicken noodle soup, sand, and oil, and water.
Thus, option C is correct.
To learn more about the solution, follow the link:
https://brainly.com/question/30665317
#SPJ7
Related Questions
This image shows the rock cycle.
Which event most likely occurs at point V?
cooling
erosion
heating
melting
Answers
Answer:
it is Thy First option
Explanation:
The student observes a great blue heron catching fish near the edge of the pond. Based on the information the student collected, which blnd will compete with the great blue heron for the same hunting spots and similar prey?
A. The mallard, because it hunts for fish while wading near the edge of the pond
B. The pied-billed grebe, because it dives in apen water to get crayfish on the bottom of the pond
C. The great egret, because it hunts in water near the edge of the pond for fish and other prey
D. None of these
Answers
Answer:
The great egret, because it hunts in water near the edge of the pond for fish and other prey
Convert 25 g CO2 to moles CO2
Answers
Scientists are creating elements for the 8th period of the periodic table. Which of the following would you expect to be true of element 119?
a. a metallic element with a large atomic radius, high ionization energy, and highly reactive.
b. a metallic element with a large atomic radius, low ionization energy, and highly reactive.
c. a metallic element with a large atomic radius, low ionization energy, but relatively unreactive.
d. a nonmetallic element with a large stomic radius, low ionization energy, and highly reactive.
Answers
Answer: A
Explanation: element 119, ununennium, is highly reactive and has high ionization energy, leave A as the only answer.
If 5.0 g of copper metal reacts with a solution of silver nitrate, how many grams of silver metal are recovered?
Cu + Ag(NO3)2=Cu(NO3)2 + Ag
Answers
Answer:
16.9g
Explanation:Cu+2AgNO3→2Ag+Cu(NO3)2
Cu will likely have a +2 oxidation state. It is higher in the activity series than Ag, so it is a stronger reducing agent and will reduce Ag in a displacement reaction. Then you need to balance the coefficients knowing than NO3 is -1 and Ag is +1.
Then to calculate the theoretical yield you need to compare moles of the reactants:
m(Cu)=5g
M(Cu)=63.55
n(Cu)=5/63.55=0.0787
By comparing coefficients you require twice as much silver: 0.157mol
n(Ag)=0.157
M(Ag)=107.86
m(Ag)=0.157x107.86=16.9g
Hence, the theoretical yield of this reaction would be 16.9g
Lance wants to separate out the salt from a solution of salt water how can he do this
Answers
*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆**☆*――*☆*――*☆*――*☆
Answer: Boiling the water
I hope this helped!
<!> Brainliest is appreciated! <!>
- Zack Slocum
*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆**☆*――*☆*――*☆*――*☆
Which of the above molecules? how did you know?
1. Sodium Nitrate
2. Carbonic Acid
3. Methane
4. Ammonia
5. Table salt
6. Carbon Dioxide
7. Atmospheric oxygen
8. Hydrochloric Acid
9. Hydrogen peroxide
Answers
Answer:
I know Sodium Nitrate,Methane,Carbon Dioxide,Atmospheric Oxygen and Hydrochloric Acid
A gas occupies 850.0 mL at a temperature of 37.0 °C. What is the volume at 132.0 °C?
plz help will give brainliest
Answers
Answer:
1,110.48 mL
Explanation:
37°C is 310K and 132°C is 405K
V/V' = T/T'
850/V' = 310/405
V' = (850×405)/310
=> V' = 1110.48 mL
When jayden applies the hydrogen peroxide to Chloes dark hair, the melanin pigments in her hair will be
Answers
Answer: her hair will be oxidized
Explanation: they hydrogen peroxide works as an oxidizing agent, releasing oxygen into the melanin pigment in the hair.
4NH3(g) + 6NO(g)→5N2(g) + 6H2O(g) Using the balanced equation calculate the mass of N2 produced from 100 grams of NH3 racing with an unlimited supply of NO.
Answers
Here's link to the answer:
bit.[tex]^{}[/tex]ly/3a8Nt8n
what is the percentage of oxygen in Li(NO2)3
Answers
Answer:
66.2 % of O
Explanation:
Our compound is the lithium nitrite.
LiNO₂
This salt is ionic and can be dissociated: LiNO₂ → Li⁺ + NO₂⁻
We determine the molar mass:
molar mass of Li + 3 . molar mass of N + 6 . molar mass of O
6.94 g/mol + 3. 14 g/mol + 6 . 16 g/mol = 144.94 g/mol
The mass of oxygen contained in 1 mol of lithium nitrite is:
6 . 16 g/mol = 96 g
So the percentage of oxygen present is:
(96 g / 144.94 g) . 100 = 66.2 %
If you have a mixture of baking soda and water, what separation technique would you use?
Answers
Answer:
I believe you can evaporate the water.
Explanation:
If you evaporate the water, it leaves the baking soda particles.
PLEASE HELP MEEEE
this is due like in 10 min
how do you explain that 1 OF2 + H2o --> 1 O2 + 2 HF demonstrates that mass is conserved in a chemical l reaction
Answers
Answer:
* the total mass of the reactants must equal the total mass of the
products (Law of Conservation of Mass)
Chemical Equation something that uses formulas and symbols to
represent the relative amounts of the reactants
and products of a chemical reaction
Explanation:
Find the number of moles in 1.00 x 1023 atoms of chromium.
Answers
Answer:
0.17 molesExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\[/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
We have
[tex]n = \frac{1.00 \times {10}^{23} }{6.02 \times {10}^{23} } = \frac{1}{6.02} \\ = 0.166112[/tex]
We have the final answer as
0.17 molesHope this helps you
If red is the color on the top of the spectrum being emitted from the prism, what is the color on the bottom?
violet
yellow
green
blue
Answers
Answer:
violet
Explanation:
hope this helps!
Name the first 20 elements on the periodic table
Answers
Answer:
HYDROGENHELIUMLITHIUMBERYLLIUMBORON CARBONNITROGENOXYGENFLUORINENEON SODIUMMAGNESIUMALUMINUMSILICONEPHOSPHORUSSULFURCHLORINEARGONPOTASSIUMCALCIUMFor the reaction 1Pb(NO3)2 + 2KI −−> 1PbI2 + 2KNO3, how many moles of lead iodide (PbI2) are produced from 300.00 g of potassium iodide (KI)?
Answers
Answer:
moles PbI₂ produced = = 0.9 mole (1 sig. fig.)
Explanation:
Given Pb(NO₃)₂ + 2KI −−> PbI₂ + 2KNO₃
300g ?moles
moles KI = 300g KI/166g/mol = 1.81 mole KI
Rxn ratio for KI and PbI₂ => 2:1
∴ moles PbI₂ produced = 1/2(1.81 mole) = 0.9036144 mole (calculator answer)
= 0.9 mole (1 sig. fig.)
32. Explain why carbon shows versatile nature why it forms so many organic compounds.
Answers
Answer:
Carbon is a versatile element and is found in many different chemical compounds, including those found in space. Carbon is versatile because it can form single, double, and triple bonds. It can also form chains, branched chains, and rings when connected to other carbon atoms.
Explanation:
meaning of versatile: capable of or adapted for many different uses, skills, etc. 2 variable or changeable.
The versatile nature of carbon can be best understood with its features such as, tetravalency and catenation. In this section let us learn more about versatility of carbon.
Carbon is a versatile element and is found in many different chemical compounds, including those found in space. Carbon is versatile because it can form single, double, and triple bonds. It can also form chains, branched chains, and rings when connected to other carbon atoms.
The two characteristic features seen in carbon, that is, tetravalency and catenation, put together give rise to a large number of compounds. Many have the same non-carbon atom or group of atoms attached to different carbon chains.
Catenation: The property of forming long chains by self-linking with other carbon atoms to form long chains, rings, double or triple bonds is called catenation.
Isomerism: Compounds with same molecular formula but different structural formula are called isomers. An isomerism commonly seen is due to difference in the arrangement of atoms or groups of atoms & is called structural isomerism. The 4 types of structural isomerism are:
Chain isomerism
Position
Functional
Metamerism
Tetravalency: Carbon has 4 electrons in its valence shell. Energy considerations do not allow it to gain or lose 4 electrons; therefore it forms covalent bonds with other elements to complete its octet. This accounts for its tetravalency and explains its ability to form a variety of compounds.
3. Look at the reaction below:
H2O + C —— CO+ H2
AH = +130kJ mol^-1
Explain what happens to the position of equilibrium if we:
a. increase the pressure
b. increase the concentration of hydrogen gas
c. increase the temperature
d. add a catalyst
Answers
Explanation:
a. pressure always favors the side with fewer molecules. in this reaction as both the sides have equal number of molecules, there won't be any change in the position of the equilibrium.
b. when the concentration of the hydrogen gas is increased. more particles would take place in the reaction and so, the rate of reaction would increase favoring the reaction concerning hydrogen gas molecules (backward reaction in this case) therefore, equilibrium would shift to the backward reaction (left).
c. as forward reaction is endothermic, when temperature is increased the equilibrium will shift to the forward reaction (right).
d. catalyst would not have any effect on the position of the equilibrium. it will only increase the rate of reaction.
hope it helps. :)
Michelle learns in science class that simple machines such as an inclined plane can change the amount of force needed to lift heavy objects. She decides to test this with an experiment.
Michelle chooses a 10 kg weight. She sets up a ramp made of smooth metal that makes an angle θ with the floor. She attaches a spring scale to the weight and the top of the ramp in order to hold the weight in place. She records the force from the spring scale, then changes θ and records it again. She repeats this several times.
In this experiment, what is the outcome variable (dependent variable)?
A.
the angle θ between the ramp and the ground
B.
the mass of the weight
C.
the material the ramp is made of
D.
the amount of force on the spring scale
PLEASE I NEED HELP ON THIS RN AND IT'S DUE TODAY!!!!!!!!
IF YOU POST ANY LINKS THAT ARE PERM-BLOCKED, I WILL REPORT YOU, TAKE YOUR POINTS AWAY, DELETE YOUR ANSWER, AND PROBABLY BAN YOU! IF YOU DO NOT KNOW, DON'T ANSWER!!!!!!!
Answers
Answer: the amount of force on the spring scale
Explanation:
d. 2 5. How many moles of HCl are needed to produce 25 moles of KCl in the presence of excess potassium permanganate? a. 16 b. 32 c. 5 d. 200
Answers
Answer:
d. 200.
Explanation:
The reaction is:
2KMnO4 + 16HCl ----> 2KCl + 2MnCl2 + 8H2O + 5Cl2
So 2 moles of KCL are produced form 16 moles of HCL
So 25 moles KCL are made from 25 * (16/2) HCl.
= 25 * 8
= 200 moles. HCl.
What is the correct formula for the compound made of magnesium and nitrogen
Answers
Answer:
Mg3N2
Explanation:
it has an inorganic compound for Magnesium and Nitrogen. if you put this two together it will the compound Magnesium nitride.
whivh of the following is an example of a synthesis reaction
Answers
Answer: hewo, there! your answer is Below
d.) 2CuCl + Cl2yields 2CuCl2
Explanation:
A synthesis reaction, also known as a combination reaction, is where two (or more) compounds combine to form a single compound.
Hope this helps!!!
Have a great day!!
Plz Mark branilest!!!
Rank the following elements by decreasing metallic character: Cesium (C's), Bromine (Br), Osmium (Os), Tin (Sn)
Answers
Answer:
Cs, Os, Sn, Br
Explanation:
Metallic character increases to the left and down the periodic table.
What hypothesis can be tested using the experimental set up shown in the picture? A) Light travels faster than sound. B) Light travels in a straight line. C) Light can pass through opaque objects. D) Light can only pass through transparent objects.
Answers
Answer:
its B.)
Explanation:
B.) Light travels in a straight line. :))
the volume of alcohol present in 409ml of 11%
Answers
Answer:
Amount of Alcohol volume present in solution = 44.99 ml
Explanation:
Given:
Total volume of solution = 409 ml
Amount of Alcohol percentage present in solution = 11%
Find:
Amount of Alcohol volume present in solution
Computation:
Amount of Alcohol volume present in solution = Total volume of solution x Amount of Alcohol percentage present in solution
Amount of Alcohol volume present in solution = 409 x 11%
Amount of Alcohol volume present in solution = 409 x 0.11
Amount of Alcohol volume present in solution = 44.99 ml
Weather along most fronts is usually cloudy with precipitation because the warm air along most fronts usually
A) sinking and cooling, causing water to evaporate
B) sinking and warming, causing water to evaporate
C) rising and cooling, causing water vapor to condense
D) rising and warming, causing water vapor to condense
Answers
Cloudy with precipitation occurs due to rising and cooling causing water vapor to condense.
Causes of cloudy with precipitationWeather along most fronts is usually cloudy with precipitation because the warm air present along most fronts usually rising and cooling which causes water vapor to condense. Warm fronts often bring stormy weather as the warm air rises above the cool air mass that makes clouds and storms.
These clouds form in the warm air that is located high above the cool air. As the front passes over a region, the clouds become lower which leads to rainfall so we can conclude that cloudy with precipitation occurs due to rising and cooling causing water vapor to condense.
Learn more about precipitation here: https://brainly.com/question/1373907
Learn more: https://brainly.com/question/22960434
Select all types of muscles.
Skeletal
ℍ
Cardiac
Stretch
Smooth
Answers
Answer:
Skeletal
Cardiac
Smooth
Explanation:
The body contains three types of muscle tissue: skeletal muscle, cardiac muscle, and smooth muscl
i need help i got these wrong on my first attempt
Answers
Meteorite: One the surface of Earth
Meteoroid: In outer space
Meteor: Entering Earths atmosphere
Explanation:
Solution (a) has a hydrogen ion concentration of 2.7 x 10^-3 and solution (b) has a hydrogen ion concentration of 4.1 M. What are their pH and say if they are acids or bases.
Answers
Answer: a) pH = 2.56 , acidic
b) pH = 2.38, acidic
Explanation:
pH or pOH is the measure of acidity or alkalinity of a solution.
pH is calculated by taking negative logarithm of hydrogen ion concentration.
[tex]pH=-\log [H^+][/tex]
a) [tex][H^+]=2.7\times 10^{-3}[/tex]
Putting in the values:
[tex]pH=-\log[2.7\times 10^{-3}][/tex]
[tex]pH=2.56[/tex]
Thus as pH is less than 7, the solution is acidic.
b) [tex][H^+]=4.1\times 10^{-3}[/tex]
Putting in the values:
[tex]pH=-\log[4.1\times 10^{-3}][/tex]
[tex]pH=2.38[/tex]
Thus as pH is less than 7, the solution is acidic.